.app-rail {
  width: var(--app-rail-width);
  flex-shrink: 0;
  z-index: 10;
  position: fixed; /* 全局公用，固定在左侧 */
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  background: rgba(var(--mdui-color-surface-container), 0.45) !important;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-right: 1px solid rgba(var(--mdui-color-outline-variant), 0.4);
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.08), 2px 0 16px rgba(0,0,0,0.08);
}

.app-rail mdui-fab {
  width: 56px !important;
  height: 56px !important;
  margin: 16px auto !important;
}

.app-rail mdui-fab.refresh-fab {
  transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.app-rail mdui-fab.refresh-state-success {
  background-color: #2e7d32 !important; /* Green */
  color: #ffffff !important;
  --mdui-color-primary-container: #2e7d32;
  --mdui-color-on-primary-container: #ffffff;
  transform: scale(1.08);
}

.fab-icon-wrapper {
  position: relative;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.fab-icon-refresh,
.fab-icon-check {
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* Idle state */
.refresh-state-idle .fab-icon-refresh {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
.refresh-state-idle .fab-icon-check {
  opacity: 0;
  transform: rotate(-90deg) scale(0.3);
}

/* Loading state */
.refresh-state-loading .fab-icon-refresh {
  opacity: 0;
  transform: rotate(180deg) scale(0.3);
}
.refresh-state-loading .fab-icon-check {
  opacity: 0;
  transform: rotate(90deg) scale(0.3);
}

/* Success state */
.refresh-state-success .fab-icon-refresh {
  opacity: 0;
  transform: rotate(180deg) scale(0.3);
}
.refresh-state-success .fab-icon-check {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.app-rail mdui-button-icon {
  width: 48px !important;
  height: 48px !important;
  margin: 16px auto !important;
}

.app-rail-svg-icon,
.app-rail-svg-icon svg {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.app-rail-svg-icon svg {
  fill: currentColor;
}

/* 手机端横向分类条（替代左侧 app-rail，默认隐藏，见 mobile.css） */
.app-rail-mobile {
  display: none;
  position: fixed;
  /* 紧贴顶栏下沿；--app-topbar-safe-height 已包含本条的高度，不能拿来当 top 用 */
  top: calc(var(--app-topbar-height) + var(--app-topbar-offset));
  left: 0;
  right: 0;
  z-index: 9;
  height: var(--app-rail-mobile-height, 0px);
  align-items: center;
  gap: 4px;
  padding: 0 10px;
  overflow-x: auto;
  overflow-y: hidden;
  background: rgba(var(--mdui-color-surface-container), 0.45);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(var(--mdui-color-outline-variant), 0.4);
}

.app-rail-mobile::-webkit-scrollbar {
  display: none;
}

.app-rail-mobile-item {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 14px;
  border: 0;
  border-radius: 20px;
  background: transparent;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
}

.app-rail-mobile-item .app-rail-svg-icon,
.app-rail-mobile-item .app-rail-svg-icon svg,
.app-rail-mobile-item mdui-icon {
  width: 18px;
  height: 18px;
  font-size: 18px;
}

.app-rail-mobile-item.active {
  background: rgb(var(--mdui-color-secondary-container));
  color: rgb(var(--mdui-color-on-secondary-container));
}

.app-rail-mobile-refresh {
  flex-shrink: 0;
  margin-right: 4px !important;
}

/* 手机端"请前往 PC 端"提示条（默认隐藏，窄屏见 mobile.css） */
.app-mobile-notice {
  display: none;
  position: fixed;
  top: calc(var(--app-topbar-safe-height) + 8px);
  left: 12px;
  right: 12px;
  z-index: 95;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 6px 12px 14px;
  border-radius: 16px;
  background: rgb(var(--mdui-color-error-container));
  color: rgb(var(--mdui-color-on-error-container));
  border: 1px solid rgba(var(--mdui-color-error), 0.25);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.app-mobile-notice-icon {
  flex-shrink: 0;
  font-size: 22px;
  color: rgb(var(--mdui-color-error));
  margin-top: 1px;
}

.app-mobile-notice-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12.5px;
  line-height: 1.55;
}

.app-mobile-notice-text strong {
  font-size: 14px;
  font-weight: 700;
}

.app-mobile-notice-close {
  flex-shrink: 0;
  margin: -4px 0 0 !important;
  color: inherit;
}

/* 液态玻璃顶部栏（替�?mdui-top-app-bar�?*/
.app-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--app-topbar-height);
  padding: 0 10px 0 16px;
  flex-shrink: 0;
  position: fixed; /* 全局公用，固定在顶部（左侧栏之右�?*/
  top: var(--app-topbar-offset);
  left: calc(var(--app-rail-width) + var(--app-topbar-inset));
  right: var(--app-topbar-inset);
  z-index: 9;
  background: var(--glass-bg, rgba(var(--mdui-color-surface-container), 0.45));
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  -webkit-app-region: drag;
  border-bottom: 1px solid var(--glass-border, rgba(var(--mdui-color-outline-variant), 0.4));
  box-shadow: var(--glass-shadow, inset 0 -1px 0 rgba(255,255,255,0.07), 0 2px 16px rgba(0,0,0,0.08));
  margin-bottom: 8px;
  transition: top 0.2s ease, left 0.2s ease, right 0.2s ease, border-radius 0.2s ease;
}

.app-titlebar-floating .app-topbar {
  border: 1px solid var(--glass-border, rgba(var(--mdui-color-outline-variant), 0.4));
  border-radius: 20px;
}

.app-titlebar-floating .app-window-controls {
  margin-right: -10px;
}

.app-titlebar-floating .app-win-close {
  border-top-right-radius: 20px;
  border-bottom-right-radius: 20px;
}

/* 弹窗遮罩出现时让侧栏独立合成，避免 Chromium 在视口边缘把模糊区域采样成黑色。 */
.app-chrome--dialog-open .app-rail {
  isolation: isolate;
  transform: translateZ(0);
  background: rgba(var(--mdui-color-surface-container), 0.72) !important;
  box-shadow: inset 24px 0 24px -24px rgba(var(--mdui-color-surface-container), 0.9),
              inset -1px 0 0 rgba(255,255,255,0.08),
              2px 0 16px rgba(0,0,0,0.08);
}

.app-chrome--dialog-open .app-topbar,
.app-chrome--dialog-open .app-topbar * {
  -webkit-app-region: no-drag !important;
  pointer-events: none;
}

.app-topbar-leading {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  -webkit-app-region: no-drag;
}

.app-topbar-title {
  font-size: 22px;
  font-weight: 600;
  color: rgb(var(--mdui-color-on-surface));
  letter-spacing: 0.01em;
  flex-shrink: 0;
  user-select: none;
  -webkit-app-region: drag;
}

.app-topbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 100%;
  -webkit-app-region: no-drag;
}

.app-window-controls {
  display: inline-flex;
  align-items: center;
  gap: 0;
  margin-left: 12px;
  padding: 0;
  height: 100%;
  background: transparent;
  border: 0;
  box-shadow: none;
  -webkit-app-region: no-drag;
}

.app-win-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  cursor: default;
  background: transparent;
  -webkit-app-region: no-drag;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.app-win-btn:hover {
  background: rgba(var(--mdui-color-on-surface), 0.06);
}

.app-win-btn:active {
  background: rgba(var(--mdui-color-on-surface), 0.1);
}

.app-win-close:hover {
  background: #e81123;
  color: #ffffff;
}

.app-win-close:active {
  background: #c50f1f;
  color: #ffffff;
}

.app-win-btn:focus-visible {
  outline: 2px solid rgba(var(--mdui-color-primary), 0.75);
  outline-offset: -3px;
}

.app-win-symbol {
  color: rgb(var(--mdui-color-on-surface));
  width: 16px;
  height: 16px;
  display: block;
  fill: currentColor;
  stroke: currentColor;
  opacity: 0.88;
  transform: translateY(0);
  pointer-events: none;
}

.app-win-btn:hover .app-win-symbol,
.app-win-btn:focus-visible .app-win-symbol {
  opacity: 1;
}

.app-win-symbol--minimize {
  width: 15px;
  height: 15px;
}

.app-win-symbol--maximize {
  width: 16px;
  height: 16px;
}

.app-win-symbol--close {
  width: 15px;
  height: 15px;
}

/* ── 服务器浏览器顶部过滤滑条组件 ── */
.top-bar-filter-container {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: 12px;
  cursor: pointer;
  user-select: none;
  padding: 6px 12px;
  border-radius: 20px;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.top-bar-filter-container:hover {
  background-color: rgba(var(--mdui-color-on-surface-variant), 0.08);
}

.top-bar-filter-container:active {
  background-color: rgba(var(--mdui-color-on-surface-variant), 0.16);
  transform: scale(0.98);
}

.top-bar-filter-text {
  font-size: 14px;
  font-weight: 500;
  color: rgb(var(--mdui-color-on-surface-variant));
  white-space: nowrap;
  transition: color 0.2s ease;
}

.top-bar-filter-container:hover .top-bar-filter-text {
  color: rgb(var(--mdui-color-on-surface));
}

.top-bar-filter-switch {
  margin: 0 !important;
  pointer-events: none;
}

/* backdrop-filter 会使 fixed 浮层相对顶栏定位，抵消顶栏的侧栏偏移。 */
.app-topbar-tooltip::part(popup) {
  translate: calc(0px - var(--app-rail-width)) 0;
  box-sizing: border-box;
  width: 240px;
  max-width: calc(100vw - 32px);
}

.topbar-card-tooltip {
  position: relative;
  display: inline-flex;
  align-items: center;
  -webkit-app-region: no-drag;
}

.topbar-card-tooltip__content {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 240px;
  max-width: calc(100vw - 32px);
  padding: 12px 16px;
  box-sizing: border-box;
  border-radius: 16px;
  background: rgb(var(--mdui-color-surface-container-highest));
  color: rgb(var(--mdui-color-on-surface));
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  font-size: 14px;
  line-height: 1.45;
  text-align: left;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 120ms ease, transform 120ms ease, visibility 120ms;
}

.topbar-card-tooltip__content strong {
  font-size: 16px;
  line-height: 1.35;
}

.app-refresh-tooltip-text {
  white-space: pre-line;
}

.app-notification-button:hover + .topbar-card-tooltip__content,
.app-notification-button:focus + .topbar-card-tooltip__content,
.app-client-update-button:hover + .topbar-card-tooltip__content,
.app-client-update-button:focus + .topbar-card-tooltip__content,
.app-refresh-indicator:hover + .topbar-card-tooltip__content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.app-notification-button {
  color: #d93025;
  -webkit-app-region: no-drag;
}

.app-client-update-button {
  color: #2e9d50;
  -webkit-app-region: no-drag;
}

.app-notification-icon {
  animation: app-notification-red-pulse 2.8s ease-in-out infinite;
}

.app-notification-tooltip-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-notification-date {
  font-size: 12px;
  opacity: 0.72;
}

@keyframes app-notification-red-pulse {
  0%, 100% {
    opacity: 0.72;
    filter: drop-shadow(0 0 0 rgba(217, 48, 37, 0));
  }
  50% {
    opacity: 1;
    filter: drop-shadow(0 0 8px rgba(217, 48, 37, 1));
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-notification-icon {
    animation: none;
  }
}

.app-refresh-indicator {
  position: relative;
  width: 24px;
  height: 24px;
  margin-left: 12px;
  margin-right: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.app-refresh-indicator__track,
.app-refresh-indicator__value {
  position: absolute;
  width: 24px;
  height: 24px;
}

.app-refresh-indicator__track {
  opacity: 0.15;
}